xf86-video-intel, modesetting branch

Nicolas Mailhot nicolas.mailhot at laposte.net
Sun Jan 28 10:11:21 PST 2007

Le dimanche 28 janvier 2007 à 18:30 +0100, Krzysztof Halasa a écrit :

> I still don't get the concept right.
> There are (usually) two CRT controllers (PIPEs). Each can be connected
> to any number of output devices such as analog VGA, digital DVI etc.
> But a video mode is a function of CRTC, not output device, isn't it?
> If I set 800x600 60Hz for VGA connected to PIPEA, SDVO connected to
> the same PIPEA will get the same 800x600 60 Hz.
> So I think we should have one list of video modes per pipe, not per
> output device.

You're thinking as a developer, "how do I connect outputs to my PIPEs".
But CRTCs do not exist for normal users, all they know are outputs and
devices. They *don't* want to help you allocate outputs to CRTCs. They
want to specify the outputs they need and let xorg use whichever magical
CRTCs are available to get this result (that may include dynamically
migrating outputs from one crtc to another as devices are

Nicolas Mailhot
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